Wow. I remember going through his bucket one day and saw all those cards and assumed they were just some normal cards to him. I would be beyond ticked. I guess the one thing to help you would be some of them being very unique cards or serial numbered so they may turn up. Id be checking ebay to see if any pop up each day.
Current BO GB's- 2012-13 National Treasures Basketball 2 Case Player Random
2012 Topps Chrome Football Team Draft